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====== ffmpeg - Subtitles - Check if ffmpeg supports manipulating subtitles ======

ffmpeg uses the **subtitles** filter to add subtitles on top of the input video.

  * The subtitles filter requires a build with libavcodec and libavformat to convert the passed subtitle files.


ffmpeg uses the **libsrt** library to add SRT subtitles on top of the input video.

  * The **libsrt** library is a portable subtitle renderer for the SRT subtitle format.
  * It converts the input subtitle file to an SRT file.


ffmpeg uses the **subtitles** filter and the **libass** library to add ASS subtitles on top of the input video.

  * The **libass** library is a portable subtitle renderer for the ASS subtitle format.
  * It converts the input subtitle file to an ASS file.



----

===== Check if libass Is enabled =====

<code bash>
ffmpeg —version
</code>

returns:

<code>
ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg developers
...
--enable-libass
...
</code>

<WRAP info>
**NOTE:**  If you can see **—-enable-libass** in the configuration, libass is enabled.
</WRAP>

----

===== Check if libsrt Is enabled =====

<code bash>
ffmpeg —version
</code>

returns:

<code>
ffmpeg version 6.1.1-3ubuntu5 Copyright (c) 2000-2023 the FFmpeg developers
...
--enable-libsrt
...
</code>

<WRAP info>
**NOTE:**  If you can see **—-enable-libsrt** in the configuration, libsrt is enabled.
</WRAP>

----